/* Basic Reset & Global Styles */
:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --accent-color: #28a745;
    --text-color: #343a40;
    --light-bg: #f8f9fa;
    --dark-bg: #343a40;
    --white: #ffffff;
    --border-color: #dee2e6;
    --font-family-sans: 'Roboto', sans-serif;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family-sans);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-bg);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

a {
    color: var(--primary-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

ul {
    list-style: none;
}

button, input[type="submit"] {
    cursor: pointer;
    border: none;
    background: transparent;
    padding: 0;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 5px;
    font-weight: bold;
    text-align: center;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
}

.btn-primary:hover {
    background-color: #0056b3; /* Darkened primary */
    text-decoration: none;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--white);
}

.btn-secondary:hover {
    background-color: #5a6268; /* Darkened secondary */
    text-decoration: none;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Header Styles */
.site-header {
    background-color: var(--white);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.header-top-bar {
    background-color: var(--dark-bg);
    color: var(--white);
    padding: 8px 0;
    font-size: 0.9em;
}

.header-top-bar .top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-top-bar .contact-info span {
    margin-right: 20px;
}

.header-top-bar .contact-info i {
    margin-right: 5px;
    color: var(--accent-color);
}

.header-top-bar .social-links a {
    color: var(--white);
    margin-left: 15px;
    font-size: 1.1em;
    transition: color 0.3s ease;
}

.header-top-bar .social-links a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.header-main-nav {
    padding: 15px 0;
}

.header-main-nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.navbar-brand {
    display: flex;
    align-items: center;
    font-size: 1.8em;
    font-weight: bold;
    color: var(--text-color);
}

.navbar-brand .logo {
    height: 40px; /* Adjust as needed */
    margin-right: 10px;
}

.navbar-brand .site-name {
    color: var(--dark-bg);
}

.main-navigation .menu {
    display: flex;
    gap: 25px;
}

.main-navigation .menu-item {
    position: relative;
}

.main-navigation .menu-item > a {
    display: block;
    padding: 10px 0;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s ease;
}

.main-navigation .menu-item > a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.main-navigation .menu-item-has-children > a::after {
    content: '\f0d7'; /* FontAwesome caret-down */
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    margin-left: 5px;
    font-size: 0.8em;
}

.main-navigation .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--white);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    min-width: 200px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    border-radius: 5px;
    padding: 10px 0;
}

.main-navigation .menu-item-has-children:hover > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.main-navigation .sub-menu li a {
    display: block;
    padding: 8px 20px;
    color: var(--text-color);
    white-space: nowrap;
}

.main-navigation .sub-menu li a:hover {
    background-color: var(--light-bg);
    color: var(--primary-color);
    text-decoration: none;
}

/* Nested sub-menus */
.main-navigation .sub-menu .menu-item-has-children > a::after {
    content: '\f0da'; /* FontAwesome caret-right */
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
}

.main-navigation .sub-menu .sub-menu {
    left: 100%;
    top: 0;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.search-form {
    display: flex;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    background-color: var(--white);
}

.search-form input {
    border: none;
    padding: 8px 15px;
    outline: none;
    flex-grow: 1;
    min-width: 120px;
}

.search-form button {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 8px 15px;
    border-radius: 0 20px 20px 0;
    transition: background-color 0.3s ease;
}

.search-form button:hover {
    background-color: #0056b3; /* Darkened primary */
}

.menu-toggle {
    display: none; /* Hidden on desktop */
    background-color: var(--primary-color);
    color: var(--white);
    padding: 10px 15px;
    border-radius: 5px;
    font-size: 1.2em;
}

.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 999;
    display: none; /* Hidden by default */
}

/* Footer Styles */
.site-footer {
    background-color: var(--dark-bg);
    color: var(--white);
    padding-top: 50px;
    font-size: 0.95em;
}

.footer-widgets {
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-widgets .grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.footer-widget .widget-title {
    font-size: 1.3em;
    margin-bottom: 20px;
    color: var(--primary-color);
    position: relative;
    padding-bottom: 10px;
}

.footer-widget .widget-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 50px;
    height: 2px;
    background-color: var(--accent-color);
}

.footer-widget p {
    margin-bottom: 15px;
    color: rgba(255,255,255,0.8);
}

.footer-widget .contact-details p {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

.footer-widget .contact-details i {
    margin-right: 10px;
    color: var(--accent-color);
    font-size: 1.1em;
}

.footer-widget ul {
    margin-bottom: 0;
}

.footer-widget ul li {
    margin-bottom: 8px;
}

.footer-widget ul li a {
    color: rgba(255,255,255,0.8);
    transition: color 0.3s ease;
}

.footer-widget ul li a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.newsletter-form {
    display: flex;
    margin-top: 20px;
}

.newsletter-form input {
    border: 1px solid rgba(255,255,255,0.3);
    background-color: rgba(255,255,255,0.1);
    padding: 10px 15px;
    border-radius: 5px 0 0 5px;
    outline: none;
    color: var(--white);
    flex-grow: 1;
}

.newsletter-form input::placeholder {
    color: rgba(255,255,255,0.6);
}

.newsletter-form .btn-subscribe {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 10px 20px;
    border-radius: 0 5px 5px 0;
    transition: background-color 0.3s ease;
}

.newsletter-form .btn-subscribe:hover {
    background-color: #0056b3; /* Darkened primary */
}

.social-media-footer {
    margin-top: 30px;
}

.social-media-footer .social-title {
    font-size: 1.1em;
    margin-bottom: 15px;
    color: var(--white);
}

.social-media-footer a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255,255,255,0.1);
    color: var(--white);
    border-radius: 50%;
    font-size: 1.2em;
    margin-right: 10px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.social-media-footer a:hover {
    background-color: var(--primary-color);
    color: var(--white);
    text-decoration: none;
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
    font-size: 0.85em;
    background-color: #2c3136; /* Slightly darker than dark-bg */
}

.footer-bottom .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.footer-bottom .copyright {
    margin: 0;
    color: rgba(255,255,255,0.7);
}

.footer-bottom .heart-icon {
    color: #dc3545; /* Red heart */
}

.footer-legal-nav ul {
    display: flex;
    gap: 20px;
}

.footer-legal-nav ul li a {
    color: rgba(255,255,255,0.7);
}

.footer-legal-nav ul li a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}


/* Responsive Adjustments */
@media (max-width: 992px) {
    .main-navigation .menu {
        display: none; /* Hide desktop menu */
        flex-direction: column;
        width: 100%;
        position: absolute;
        top: 100%; /* Below the header-main-nav */
        left: 0;
        background-color: var(--white);
        box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        z-index: 998;
        padding: 10px 0;
    }

    .main-navigation .menu.active {
        display: flex;
    }

    .main-navigation .menu-item {
        width: 100%;
        border-bottom: 1px solid var(--light-bg);
    }

    .main-navigation .menu-item:last-child {
        border-bottom: none;
    }

    .main-navigation .menu-item > a {
        padding: 12px 20px;
    }

    .main-navigation .menu-item-has-children > a::after {
        position: absolute;
        right: 20px;
        top: 50%;
        transform: translateY(-50%);
    }

    .main-navigation .sub-menu {
        position: static;
        box-shadow: none;
        background-color: var(--light-bg);
        transform: none;
        opacity: 1;
        visibility: visible;
        display: none; /* Controlled by JS */
        padding: 0 0 0 20px;
        border-top: 1px solid var(--border-color);
    }

    .main-navigation .menu-item.sub-menu-active > .sub-menu {
        display: block;
    }

    .main-navigation .sub-menu li a {
        padding: 10px 20px;
    }

    .menu-toggle {
        display: block; /* Show mobile menu toggle */
    }

    .header-main-nav .container {
        flex-wrap: wrap;
        justify-content: space-between;
    }

    .header-actions {
        order: 3; /* Move actions below logo/toggle */
        width: 100%;
        justify-content: center;
        margin-top: 15px;
    }

    .search-form {
        flex-grow: 1;
        max-width: 300px;
    }

    .navbar-brand {
        flex-grow: 1;
    }

    .footer-bottom .container {
        flex-direction: column;
        gap: 15px;
    }
}

@media (max-width: 768px) {
    .header-top-bar .top-bar-content {
        flex-direction: column;
        gap: 10px;
    }
    .header-top-bar .contact-info {
        text-align: center;
    }
    .header-top-bar .social-links {
        margin-top: 5px;
    }
    .footer-widgets .grid-container {
        grid-template-columns: 1fr;
    }
    .footer-bottom .footer-legal-nav ul {
        flex-direction: column;
        gap: 10px;
    }
}
/* 移动端内容区防溢出（系统追加，请勿删除） */
@media (max-width: 768px) {
  .page-content img {
    max-width: 100% !important;
    height: auto !important;
    display: block;
  }
  .page-content {
    overflow-x: hidden;
    max-width: 100%;
  }
  body {
    overflow-x: hidden;
  }
}